Tubular incandescent lamp and support therefor



Feb. 10, 1931. F. JACOPOZZI TUBULAR I NCANDESCENT LAMP AND SUPPORT THEREFOR Filed June 4, 1927 AW Q 2W,

I/VI/E/VTOR F ERNAND JACOPOZZI v 5 21219 a fiprneys Patented Feb. 10, 1931 rrn- FERNAND JACOPGZZLOF PARIS, FRANCE TUBULARTNCANDESCENT LAMP AND SUPPORT THEREFOR Application filed June 4, 1927, Serial No. 196,569, and in France January 26, 1927.'

The invention relates to incandescent electric lamps having tubular form and suitable for attachment together to form long lines of illumination such as are used in store indows, show cases, ceilings, signs and indirect lighting. The invention relates more particularly to the mounting of the lamps, one of the principal objects of the invention bein to light a surface uniformly without breaths or shadows. With the lamps heretofore known the dark zones or unlighted portions of a line of lamps between the individual lamps have been very prominent but according to the present invention the bases of the lamps are reduced in size and the shadows or unlighted portions eliminated. Another object of the invention is to produce means by which the lamps can be connected together at any desired angle. To accomplish this the bases of the lamps are adapted to be fastened directly to one another by small feet which also provide a point of support.

In the drawings:

Fig. 1 is an end elevation of an insulating support adapted to carry the new lamps;

Fig. 2 is a side elevation of the support;

Fig. 3 is a plan view of the support;

F ig. 4: is a perspective view showing the bases of two adjacent lamps and a support 0 about to be fastened together;

Fig. 5 is a similar view showing the mounting completed; and

Fig. 6 is an elevation of the two lamp ends mounted on the support. Heretofore when incandescent electric lamps of tubular form with bases at oppo-- site ends were used to make long lines of 59 In the example shown in the drawing the bases are each made in the form of a plain shell 1 on the body 2 of the lamp, the shell being flat or slightly convex with a small foot 3 projectingtheretrom. This foot can be a Hat piece of malleable metal and pierced by a hole 3a for the passage of a screw 4. This screw serves to fasten the feet of the adjacent bases of the two'lamps together and also to mount, the lamps on the insulated support. The screw 4 is fixed in an upright position in a boss 5 forming part of the insulating support 5a and projecting upwardly from the center of the support. For the purpose of mounting the support on the reflector, or wall, there are vertical holes 57) passing through the support on either side of the boss 5 in line with the line of lamps. There is a horizontal hole 50 passing through the support at one side and correspondingly located at the other side is a groove or slot 5d. This hole 50 and slot 503 are for the Wires 7, 8 which carry the current. In the support shown in the drawings the wire 8 lies in the slot 5d and passes straight through the support without electrical con nection to the lamps but the wire 7 which lies in the hole 50 is in electrical contact with the screw 4. The hole 50 has a metallic sleeve 6 and two set screws 6a passing downwardly from the top of the support through holes 5ein'the support 5a and through the sleeve 6 into contact with the wire 7 (Figs. 1 and 3.) The insulation is removed from the wire 7 opposite the setscrews, as usual, the wire being cut or not between the two setscrews as desired. The sleeve 6 is in electrical contact with thescrew 4. a

At adjacent supports the roles of the two wires are reversed, the wire 8 being placed in the hole 50 in the supports adjacent the one shown in the drawings, and the wire 7 lying in the slot 5d. In attaching the feet to the screw 4 coiled springs 9, 10 can be placed on the screw above and below the feet, if desired, the two feetbeing superimposed one on the other. A nut 11 is then put on the screw 4 above the top spring 10 and when this is screwed down the bases are fastened together. This nut 11 can be covered with a small insulating cap if desired to avoid the danger or discomfort to the person attaching the parts together. The feet of the bases being malleable, the lamps adjust themselves in line without any trouble. It should be noted that the lamps can be swung at any angular relation desired in a horizontal plane and that the springs providea certain elasticity which is peculiarly useful when the support on which the lamps are mounted is exposed to vibration.

As indicated in Fig. 1, the insulating support 5a may, if desired, be inclosed by two cooperating channel members 12, 12a, the cover12a lying outside the base 12 and the base and cover portions, as required, in order to allow the base 5 and the necessary fastening screws to pass.

Many variations of the example above described will occur to those skilled in the art without departing from the scope of the invention.

WVhat I claim is:

l. Aline of tubular incandescent lamps having bases on the ends thereof in the form of terminal shells each having at its center a perforated malleable terminal foot, in combination with an insulating support between each two adjacent lamps, a bracket on said support and screw fastening means'on top of said bracket, two springs associated with said fastening means; said fastening means being adapted to pass through the feet of said adjacent bases and fasten them between said springs.

2. A line of tubular incandescent lamps having a convex disc applied at each eX- tremity of each bulb as a base, and a thin malleable perforated foot carried directly on the center of each disc, in combination with an insulating support between two adjacent lamps, a bracket on said support, a screw at the upper end of said bracket adapted to passthrough the holes of the feet of said adjacent bases and a nut on said screw for fastening said feet.

3. A line of incandescent tubular lamps having bases in the form of shells ateach 6X- tremity, each shell carrying at its center a malleable perforated terminal foot, an insulating support between two adjacent lamps, a bracket onsaid support, a screw at the up per end of said bracket adapted to pass through the holes of the feet of said adj acent lamps, a spring under said feet, another spring on top and a nut on said screw for fastening said feet between said springs.

In testimony whereof I have signed my name to this specification.

FERNAND JACOPOZZI. 

